We put some blue topaz into an ultrasonic detergent soak overnight
and it came out cloudy looking, as if there were a film of soap on
the pavilion. Tried scrubbing with alcohol to no avail. Further
inspection showed that the pavilion facets were basically unpolished
with many little scratches visible. So it seems that some type of
coating was used instead of a proper polish. Possibly oil or ? We
still have quite a few of these so I think we will be inspecting
them in the daylight, and then we’ll decide what to do.
Has anyone else ever seen this type of thing before? I hope this is
not a common new thing.